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You got me! It was the quickest way to cure the problem each time - even if it was only a temporary fix. Been so busy with other stuff, I didn't have time to do anything else. Now finally trying to get a bit of sanity and looking for a longer cure. But sure - been insane the last couple of...

It came as a complete unit .... screw the old one off, screw the new one on.

I *believe* it is a high pressure valve .... its what the plumbers said was needed!

Thanks. I have bent the arm, but it still doesn't shut off. Will get the float you suggest and try that. I live in a rural village ... maybe the pressure varies a lot ... similar to the livestock troughs you mentioned. Cheers

Thanks for the suggestion. The pipework is secured to a wooden frame and is fairly rigid, so I don't *think* that's an issue. Cheers

They've cost about 25 quid a time. (100 quid when the plumbers have fitted them.) I've thrown 5 away. Have got 3 left. I'll have to see if I can get some new washers for them. Thanks for the idea. Can't see any grid or dirt or degradation. I'll try a 6 inch copper float. Thanks to all!!!

I've done both at different times. Change the float and reused an old float. At the moment I have a choice of 2 floats, but they both perform in the same way... they don't close off the valve completely.

:lol:

Easy for someone who knows what they are doing and who doesn't wreck 99 percent of the things they touch. Really think I'd better call a plumber rather than flood the house and get into trouble with the family!

Thanks .... that means I definitely need a plumber .... but at least I now know what to ask for. Cheers! (where's the emoticon for beer?)

[/url] Many thanks - again! Do I put that in the tank before the valve .... think it might be time to call a plumber.....

Do you mean something like this: http://www.tycowaterworks.com/pdf/EQUILIBRIUM%20BALL%20FLOAT%20VALVES/EBCO%20Float%20Valves%20Data%20Sheet.pdf Cheers

Thanks, again. I thought brass was meant to be better/stronger/longer lasting than plastic, but I'm happy to give anything a go. Appreciate the advice. Will see what I can get from the local plumb centre. Cheers.

I think we do. I don't know any way to measure the pressure, but as a layman's guess from comparing the other places I have lived in, I would say we do. This is the strongest water flow of any house I've ever been in. We're out in the country. Don't know if the water comes from a bore or what...

Thanks for the 2 replies above. The thing I keep replacing LOOKS like this (might not be exactly the same): The water level looks like it should stop about 4 or 5 inches below the level of the overflow ... but it doesn't stop filling up ... as the ball rises, the flow rate does slow...

Ah, I see. But I am sure the tank isn't flexing. It is very rigid. It is about 5 years old and very sturdy. When I have bought new equilibrium valves, I have replaced the entire units ... so I don't *think* anything is missing. But I'm just an inexperienced and not very competent DIYer, so I...

Thanks for the reply. Some kind of plastic. All the fittings to it look like brass. The tank itself isn't leaking .... it is just that the valve isn't shutting off. The force created by the rising ball valve doesn't seem enough to make the valve close.... Thanks

Hi I live in the UK (if that matters!) and have a problem with the water tank in the loft: it keeps overflowing. I have fitted 4 new brass equilibrium ball valves in the past year. For a month or so they seem to work okay (shutting off the water as the water/ball float rises), but after...